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06/11/2013 09:32

2 ) Charge pump type scheme

  MR16 ON Semiconductor 's patented four -mode (Quad-Mode ®) adaptive fractional charge pump EER market conventional tri-mode charge pump provides 10% higher , and reduce as much as 65 % of the package, the LED drive performance elevated to a new level . Quad-Mode LED driver can be typically an inductor-based LED drivers provide energy efficiency, while eliminating harmful thicker inductance and EMI interference .

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Most charge pump LED drivers provide corresponding output voltage and the input voltage is higher than the three modes of operation : 1 times, 1.5 times and 2 times ; while the four -mode architecture increases 1.33 times the fourth mode of operation, no additional capacitance and inductance. It is more than three -mode charge pump efficiency is improved by 10%.

LED Flexi

Figure 2: Charge Pump Scenario

 

ON Semiconductor offers a total output current of 10 mA to 192 mA for a variety of products , covering NCP1840, CAT3661, NCP5612, CAT3647, CAT3200, CAT3200H, CAT3606, CAT3616, CAT3626, CAT3636, CAT3637, CAT3649, CAT3604A, CAT3604V, CAT3614, CAT3644, CAT3648, NCP5623B / C and CAT3643 , etc. ; there is a greater output current products NCP5603 (200 mA DC, 350 mA pulse ), CAT3612 (300 mA) and CAT3224 (4 flash , 400 mA flashlight ) and so on.

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